by Voortman, Roelf L., Brouwer, Joost, Albersen, Peter J.
Published in Geoderma (01.07.2004)

by Voortman, Roelf L, Sonneveld, Ben G J S, Keyzer, Michiel A
Published in Ambio (01.08.2003)

by Keyzer, Michiel A., Merbis, Max D., Voortman, Roelf L.
Published in De Economist (Netherlands) (01.12.2008)

by Florax, Raymond J.G.M, Voortman, Roelf L, Brouwer, Joost
Published in Agricultural economics (01.11.2002)

by Voortman, Roelf L, Brouwer, Joost
Published in Nutrient cycling in agroecosystems (01.06.2003)

by Florax, Raymond J.G.M., Voortman, Roelf L., Brouwer, Joost
Published in Agricultural economics (01.11.2002)

by van Wesenbeeck, Cornelia F.A., Sonneveld, Ben G.J.S., Voortman, Roelf L.
Published in Applied geography (Sevenoaks) (01.01.2016)

by Keyzer, Michiel A, Voortman, Roelf L
Published in Agricultural systems (01.11.1998)

by Voortman, Roelf L
Published in De Economist (01.06.2005)

by Voortman, Roelf L.
Published in Physics and chemistry of the earth (1998)

by Florax, Raymond J.G.M, Voortman, Roelf L, Brouwer, Joost
Published in Agricultural Economics: The Journal of the International Association of Agricultural Economists (01.11.2002)

by Andersen, Lykke E, Granger, Clive W.J., Reis, Eustáquio J, Weinhold, Diana, Wunder, Sven, Voortman, Roelf L
Published in De Economist (01.06.2005)